Debating brain drain: Three objections that complicate the picture

In my contribution to this brain drain debate sparked by Brock and Blake’s book, Debating Brain Drain, I respond only to Brock’s position, and raise three objections which I suggest complicate the picture that she sketches. First, I take issue with the way in which she frames the moral question, namely by limiting her focus to what home countries may legitimately do to address the problems associated with the brain drain. I argue that the way in which she frames the question has important ideological consequences, because she does not adequately account for the larger context, in particular, by leaving out the moral obligations of the host countries who are the main beneficiaries of the brain drain. My second objection is rooted in the distinction between technical knowledge and practical knowledge found in the work of Habermas – an important distinction which gets obscured in Brock’s analysis in precisely the kind of ideological ways that Habermas was concerned about. She namely attempts to solve what are mainly practical (political) problems through purely instrumental, technical means. Several distortions accompany this fundamental confusion. My third point of critique has to do with the problem that an ethics of care (an ethics of responsibility and obligation) encounters within a liberal paradigm strongly shaped by an ethics of rights. Drawing on the work of Kroeger-Mappes, I argue that Brock arbitrarily singles out a group of people and holds them to an ethics of care which is strictly supererogatory within her own liberal paradigm.     

The economics and philosophy of the brain drain: A critical perspective from the periphery

The paper provides a critical perspective on recent contributions to the economics literature, and associated philosophical arguments, that downplay negative effects of skilled migration on developing countries. The assertion that such migration incentivises investment in human capital is shown to rely on shaky theoretical foundations and weak empirical evidence. The associated economic literature suggesting a net positive effect of brain drain is at odds with literatures on the positive effects of human capital and education on economic growth. The manner in which net effects are determined also demonstrates that such contributions are utilitarian in nature. Identifying those who are the worst affected by brain drain, as well as the possible decision of a citizen placed behind the veil of ignorance, supports the view that opposing barriers to brain drain is inconsistent with a Rawlsian social welfare function. The undermining of institutions by skilled emigration is a fundamental consideration neglected by the economics literature without justification and, again, contradicts literatures on growth and institutions within economics. The economic theory of education can also be shown to support the view that depriving governments of the power to limit migration undermines states’ ability to resolve market failures. A number of other issues are identified that deserve greater consideration, including reflexivity in research on brain drain, the political economy of skilled migration and the philosophical status of nation-states. Despite unreliable econometric evidence, there is sufficient basis and justification to act. The paper concludes by briefly sketching possible actions under different degrees of international cooperation.     

The ethics and politics of the brain drain: A communal alternative to liberal perspectives

In Debating Brain Drain, Gillian Brock and Michael Blake both draw on a liberal moral-political foundation to address the issue, but they come to different conclusions about it. Despite the commonly held value of free and equal persons having a dignity that grounds human rights, Brock concludes that many medical professionals who leave a developing country soon after having received training there are wrong to do so (if they do not provide compensation) and that the state may place some limits on their ability to exit, whereas Blake infers that there is neither any wrongdoing on their part, nor rightful restrictions placed on them. In this article, rather than sort out which has the better interpretation of what liberalism entails, I consider the medical brain drain in the light of an alternative normative framework, one informed by ideals of communion salient in the sub-Saharan moral tradition. I argue that a principle of prizing communal relationships more naturally entails Brock’s conclusions than does her appeal to liberalism.     

Pentecosmopolis: on the pentecostal cosmopolitanism of Lagos

ABSTRACT

Based on ethnography conducted in Lagos, one of the foremost pentecostal cities in the world, this article coins the interconnected concepts of ‘Pentecosmopolis’ and ‘pentecosmopolitanism’ to account for forms of cosmopolitanism that are shaped at the intersection of Pentecostalisms and urbanisms. These concepts highlight the dialectical role of Pentecostalisms in the cosmopolitization of urban sociospatialities, and of urbanisms in the cosmopolitization of Pentecostalisms. This article disbands the ideas of Pentecosmopolis and pentecosmopolitanism into two interconnected sub-concepts of ‘pentecosmopolitan spatiality’ and ‘pentecosmopolitan sociality’––of ‘pentecosmopolitan sociospatiality’. Against the background of marginality in scholarship, I examine the cosmopolitization—the diversification and contrastification—of sociospatial symbolisms, practices and relationalities taking shape in the city at the behest of Pentecostalisms, and in Pentecostalisms at the behest of the city.     

Categories in the pigeon brain: A reverse engineering approach

Pigeons are well known for their visual capabilities as well as their ability to categorize visual stimuli at both the basic and superordinate level. We adopt a reverse engineering approach to study categorization learning: Instead of training pigeons on predefined categories, we simply present stimuli and analyze neural output in search of categorical clustering on a solely neural level. We presented artificial stimuli, pictorial and grating stimuli, to pigeons without the need of any differential behavioral responding while recording from the nidopallium frontolaterale (NFL), a higher visual area in the avian brain. The pictorial stimuli differed in color and shape; the gratings differed in spatial frequency and amplitude. We computed representational dissimilarity matrices to reveal categorical clustering based on both neural data and pecking behavior. Based on neural output of the NFL, pictorial and grating stimuli were differentially represented in the brain. Pecking behavior showed a similar pattern, but to a lesser extent. A further subclustering within pictorial stimuli according to color and shape, and within gratings according to frequency and amplitude, was not present. Our study gives proof‐of‐concept that this reverse engineering approach—namely reading out categorical information from neural data—can be quite helpful in understanding the neural underpinnings of categorization learning.     

自尊的认知神经机制

自尊是个体对自己总体的情感性评价。自尊有助于促进个体的心理健康,帮助个体应对威胁,具有重要的适应价值。近年来随着社会认知神经科学的兴起,关于自尊的认知神经机制的研究日益增多,主要涉及三个方面:1)自尊与大脑的结构(如海马体积、前扣带回等区域的灰质体积)和功能(静息态下的默认网络活动以及脑区之间的功能联结性)存在一定的关联;2)自尊调节大脑对威胁的反应,与高自尊个体相比,低自尊个体面对威胁时产生更强的防御性反应,自尊通过影响个体面对威胁时的大脑活动帮助个体更好地应对威胁;3)自我评价过程涉及大脑前额叶、眶额叶、扣带回等多个脑区,自尊调节个体在自我评价过程中的大脑活动。总之,自尊作为个体重要的人格特质,与大脑的结构、功能以及活动状态等都具有一定的关系;这些发现在一定程度上揭示了自尊的神经机制,加深了对自尊及其功能的理解。     

Reverse migration,brain drain and global justice

This paper contributes to the discussion of the ethics of brain drain against the background of the book Debating Brain Drain co-authored by Gillian Brock and Michael Blake. Whereas Gillian Brock argued in this book that a plausible response of global justice would, under certain conditions, permit that developing countries impose taxes or demand compulsory service from their professionals who emigrate, Michael Blake rejects such claims in his defence of the right to emigrate. Extending this debate to the context of reverse immigration, I attempt in this paper to establish if the arguments provided by both scholars are capable of accounting for the cogency or otherwise of preference in reverse immigration. My proposal is that the arguments provided by both Brock and Blake require further contextualisation to make them capable of deciding the question of preference in reverse immigration.     

Isolating the interference caused by cue duration in partial report: A quantitative approach

In bar-probe partial report experiments, subjects are presented with a brief array of letters, followed by a cue that singles out a target letter. Using this procedure, V. M. Townsend (1973) reported a counterintuitive effect: As the duration of a cue was increased, target performance decreased dramatically. The aim of the present study was to isolate the locus of the cue-duration effect. To this end, several characteristics of the bar-probe display were manipulated in a single experiment: the interstimulus interval between the array and the cue, array density, the number of letters, and the number of symbols adjacent to the target. These factors were manipulated on a priori grounds so as to affect the different sources of information used in the bar-probe task--namely, durable storage, abstract identity information, and feature level information. The data were accurately fit by a simple quantitative, multinomial model that assumes that the different sources of information used in the bar-probe task make independent contributions to performance. The critical assumption of the model is that cue duration interferes with only one source of information--namely, feature level information.     

Neurocognitive outcomes following pediatric brain injury: A developmental approach

Developmental neuropsychologists postulate that “immaturity” of the cerebral cortex should no longer be perceived as a protective factor. They argue that injury to the young brain may affect new learning by disrupting the skills in the midst of being acquired and skills that are yet to be developed. Cognitive deficits or weaknesses that are not detectable in the acute phase following a traumatic brain injury (TBI) may emerge over development as more complex skills are needed, thereby creating a developmental lag between children who sustained a pediatric TBI and typical age peers. This literature review was conducted to evaluate the developmental perspective on neurocognitive recovery/development following a TBI. Overall, the described findings support a developmental view and suggest that predictions of prognosis should be based on the child's remaining ability to learn.     

Taking up the slack: The duties of source state citizens in the brain drain crisis1

This paper proposes two shifts in our approach to the brain drain crisis. First, it argues for a collective view. Since the moral wrong of the brain drain is inherently collective, we can best understand our consequent duties through a collective lens. Second, the paper argues that we ought to explore explicitly the duties of citizens of source states. These citizens systematically bear the burdens of labour migration, giving us good reason to search for normative guidelines for how best to understand and distribute these burdens. Drawing on these two shifts, the paper argues that the obligations of citizens of source states are best understood as individual shares of a collective duty to uphold the functioning of their state. The content of this duty is deeply shaped by background injustice and so ought to be understood as a duty to “take up the slack”. As such, individuals’ shares are differentiated to respect the diversity of individual circumstance and, where formal policy is required, it ought to be democratically determined.     

Cued shifts of attention and memory encoding in partial report: A dual-task approach

This study explores how cued shifts of visual attention and rapid encoding of visual information relate to limited-capacity processing mechanisms. Three experiments were conducted placing a partial-report task within a dual-task paradigm. Experiments 1 and 2 involved a simple speeded visual discrimination (Task 1) and then an unspeeded partial-report task (Task 2). Generally, Task 2 accuracy declined as the temporal overlap between the two tasks increased. In addition, in Experiment 1, varying the number of items in the partial-report display had an effect on performance regardless of overlap. In contrast, in Experiment 2, varying the type of probe had an effect only at long task overlap. The generality of the interference effect was tested in Experiment 3 using an auditory discrimination as Task 1. Again, Task 2 accuracy declined as the temporal overlap between the two tasks increased. In all cases, the observed interference had the properties of a processing bottleneck. It is argued that encoding information into memory and response selection for the first task both require general-purpose processing. The results are discussed in terms of the functional relationship between attention and memory.     

Gait measurement in chronic mild traumatic brain injury: A model approach

IntroductionMild traumatic brain injury (mTBI) can impact gait, with deficits linked to underlying neural disturbances in cognitive, motor and sensory systems. Gait is complex as it is comprised of multiple characteristics that are sensitive to underlying neural deficits. However, there is currently no clear framework to guide selection of gait characteristics in mTBI. This study developed a model of gait in chronic mTBI and replicated this in a separate group of controls, to provide a comprehensive and structured methodology on which to base gait assessment and analysis.MethodsFifty-two people with chronic mTBI and 59 controls completed a controlled laboratory gait assessment; walking for two minutes back and forth over a 13 m distance while wearing five wirelessly synchronized inertial sensors. Thirteen gait characteristics derived from the inertial sensors were selected for entry into the principle component analysis based on previous literature, robustness and novelty. Principle component analysis was then used to derive domains (components) of gait.ResultsFour gait domains were derived for our chronic mTBI group (variability, rhythm, pace and turning) and this was replicated in a separate control cohort. Domains totaled 80.8% and 77.4% of variance in gait for chronic mTBI and controls, respectively. Gait characteristic loading was unambiguous for all features, with the exception of gait speed in controls that loaded on pace and rhythm domains.ConclusionThis study contributes a four component model of gait in chronic mTBI and controls that can be used to comprehensively assess and analyze gait and underlying mechanisms involved in impairment, or examine the influence of interventions.     

Brain drain: A communitarian response to Brock and Blake

The problem of brain drain, the movement of skilled citizens of developing countries to developed ones, arises largely because of seriously unequal life prospects in different countries. Hence, there is something profoundly wrong with the brain drain, something that calls for a moral response. Brock and Blake offer such a response by debating the ethical rights and responsibilities of skilled professionals, and of the societies in which they live, from the perspective of moral liberalism. The aim of my paper is to develop a response to some of their arguments from the perspective of moral communitarianism, with particular reference to the work of one of its classical proponents in African philosophy, Kwame Gyekye.     

A rigorous approach for testing the constructionist hypotheses of brain function

Although the target article provides strong evidence against the locationist view, evidence for the constructionist view is inconclusive, because co-activation of brain regions does not necessarily imply connectivity between them. We propose a rigorous approach wherein connectivity between co-activated regions is first modeled using exploratory Granger causality, and then confirmed using dynamic causal modeling or Bayesian modeling.     

Two types of empirical adequacy: a partial structures approach

The notion of empirical adequacy has received recent philosophical attention, especially within the framework of the semantic approach. Empirical adequacy, as explicated in the semantic approach, concerns the relationship between empirical substructures and some phenomena. The aim here is to differentiate this notion of empirical adequacy from one concerning the relationship between data and phenomena. Distinguishing each notion of empirical adequacy emphasizes different aspects of scientific practice—one concerning theory-development from the basis of an established theory, the other concerning theory-development from the basis of data-fitting, where established theory may not foster further development. To illustrate this contrast, an example from financial economics is considered.     

Intersectionality: A Model for Addressing the Complexity of Oppression and Privilege

This essay proposes that adopting an intersectional theoretical approach amenable to the values and commitments of our field will enhance our efforts as pastoral theologians seeking to analyze, engage, and resist oppression and privilege in response to forms of difference. Intersectionality is a model that effectively addresses complex individual, relational, structural, and ideological aspects of domination and privilege arising from forms of difference treated oppressively. Methodologically, intersectionality pursues emancipatory praxis toward its telos of social justice. This essay introduces key themes in intersectional theory and draws on them to analyze a case. The essay also briefly explores both points of convergence in the literatures of intersectionality and pastoral and practical theology and points to which pastoral and practical literature may add value to intersectional theory.     

On the transmission of partial information: inferences from movement-related brain potentials.

Results are reported from a new paradigm that uses movement-related brain potentials to detect response preparation based on partial information. The paradigm uses a hybrid choice-reaction go/nogo procedure in which decisions about response hand and whether to respond are based on separate stimulus attributes. A lateral asymmetry in the movement-related brain potential was found on nogo trials without overt movement. The direction of this asymmetry depended primarily on the signaled response hand rather than on properties of the stimulus. When the asymmetry first appeared was influenced by the time required to select the signaled hand, and when it began to differ on go and nogo trials was influenced by the time to decide whether to respond. These findings indicate that both stimulus attributes were processed in parallel and that the asymmetry reflected preparation of the response hand that began before the go/nogo decision was completed.